res-react-intl/postinstall.js

Reason/OCaml PPX generating ReactIntl `id` from `defaultMessage`

#!/usr/bin/env node

const path = require('path')
const cp = require('child_process')
const fs = require('fs')

const platform = process.platform

const binariesToCopy = ['ppx', 'extract']

function find_arch() {
  // The running binary is 64-bit, so the OS is clearly 64-bit.
  if (process.arch === 'x64') {
    return 'x64'
  }

  // All recent versions of Mac OS are 64-bit.
  if (process.platform === 'darwin') {
    return 'x64'
  }

  // On Windows, the most reliable way to detect a 64-bit OS from within a 32-bit
  // app is based on the presence of a WOW64 file: %SystemRoot%\SysNative.
  // See: https://twitter.com/feross/status/776949077208510464
  if (process.platform === 'win32') {
    var useEnv = false
    try {
      useEnv = !!(process.env.SYSTEMROOT && fs.statSync(process.env.SYSTEMROOT))
    } catch (err) {}

    const sysRoot = useEnv ? process.env.SYSTEMROOT : 'C:\\Windows'

    // If %SystemRoot%\SysNative exists, we are in a WOW64 FS Redirected application.
    const isWOW64 = false
    try {
      isWOW64 = !!fs.statSync(path.join(sysRoot, 'sysnative'))
    } catch (err) {}

    return isWOW64 ? 'x64' : 'x86'
  }

  if (process.platform === 'linux') {
    const output = cp.execSync('getconf LONG_BIT', { encoding: 'utf8' })
    return output === '64\n' ? 'x64' : 'x86'
  }

  return 'x86'
}

// Implementing it b/c we don"t want to depend on fs.copyFileSync which appears only in node@8.x
function copyFileSync(sourcePath, destPath) {
  const data = fs.readFileSync(sourcePath)
  const stat = fs.statSync(sourcePath)
  fs.writeFileSync(destPath, data)
  fs.chmodSync(destPath, stat.mode)
}

const copyPlatformBinaries = (platformPath) => {
  const platformBuildPath = path.join(__dirname, platformPath)

  binariesToCopy.forEach((binaryPath) => {
    const sourcePath = path.join(platformBuildPath, binaryPath)
    const destPath = path.join(__dirname, binaryPath)
    if (fs.existsSync(destPath)) {
      fs.unlinkSync(destPath)
    }
    copyFileSync(sourcePath, destPath)
    fs.chmodSync(destPath, 0o755)
  })
}

const arch = find_arch()

const platformPath = 'platform-' + platform + '-' + arch
const supported = fs.existsSync(platformPath)

if (!supported) {
  console.error('res-react-intl does not support this platform :(')
  console.error('')
  console.error('If you want res-react-intl to support this platform natively,')
  console.error('please open an issue at our repository, linked above.')
  console.error('Specify that you are on the ' + platform + ' platform,')
  console.error('and on the ' + arch + ' architecture.')
  process.exit(1)
}

copyPlatformBinaries(platformPath)